Improvement in lock-nuts



JOHN MILLER-JIL, F MARSHALLTWN, IOWA.rv

Letters Patent No. 108,927, dated November 1, 1870.

IMPROVEMENT IN .LOCK-NUTS.

The Schedule referred to in these Letters Patent and making part of the same railrozni-track, showing the elongated metal strip at? tached to the fish-plate;

Figure 2 represents an end view, showing my nut- `loek; and

Figure 3 represents a section ot' the bolt.

The nature ot1 my invention consists in a novel manner ot' locking the nut upon the end ot' the boit, as will be more fully hereinafterdescribed.

A A in the annexed drawing represent the sections of a railroad-track, and

B B represent the fish-joints, bot-li being of the, usual construction.

Upon the exterior of the {ish-joint B is secured au elongated metal bar, (t, which is convex ou its outer face, as shown in figs. 1 and-2.

C represents the bolt which passes through the fishpieces B' B and rails A, as well as through the bar a.

This bolt is made in the usual form excepting the head D, which is recessed ou its inner side and -incloses a rubber or other elastic spring, E.

I represents the nut which secures the bolt. This nut is grooved or made concave on its inner side so as to snugly tit the convexity oft-he metal bar a.

The operation of my invention is substantially as follows:

lhe rubber spring being in the head D, the boit C is passed through the usual openings in the fish-pieces B B and the rails A, as well as the plat-e a.

The lint I is then screwed'on the end of the bolt, tightly compressingr the spring in the. head and clasp- .ing itself against the convex plate a, making a sub-A stantial lock;

By my invention the nut cannot work itself loose from the boit by jarring or otherwise.

I am aware that a nut-lock, composed of abolt with a convex under surface of head, and convex nut with l two concave spring {ish-pieces counter-sunk around the holes where the bolt passes, for the head and nut to t in, is not new, hence l disclaim such to be anypart of my invention.

My nut-lock is applied to the usual form of tishpieces in common use. I add or form with onefof the iish-pieces an elongated rib. I use a bolt having a recessed'head inclosing a sprinrf. The nut I use has two concave grooves crossing each other at right angies, and which tit over the convex rib.

Having thus fully described my invention,

\Vhat,I claim as new, and desire to secure by Letters Patent, is-

The combination of the recessed head D of .the bolt C, spring E, relongated plate a, convex on its outer surface, and the nut I concaved on its inner surface,

all substantially as shown and described.

Witnesses: JOHN MILLER, Jn..

Amos RUSSELL, FRANK Cox. 

